CHOROID PLEXUS
The choroid plexus is a sheet-like structure located inside the ventricles of the brain. It consists of a single layer of specialized cuboidal epithelial cells, called choroid epithelial cells, that covers a rich network of fenestrated capillaries.
The choroid epithelial cells produce and secrete cerebrospinal fluid (CSF) into the brain ventricles. CSF also fills the subarachnoid space and the cavities of the spinal cord.
The epithelium and the underlying connective tissue are extensively folded into numerous villi. This arrangement greatly increases the surface area available for CSF production.
The choroid plexus epithelium was introduced in the chapter on Epithelial Tissue.
The image shows a region of the choroid plexus located on the surface of the cerebellum, which can be seen on the left.
Hover your cursor over the image or click on it to identify the choroid plexus, highlighted in blue.
